/Engine/Plugins/Online/OnlineSubsystem/Source/Public/Interfaces/OnlineSessionInterface.h
Unregisters a local player with a session.
void UnregisterLocalPlayer ( const [FUniqueNetId](API\Runtime\CoreOnline\Online\FUniqueNetId) & PlayerId, [FName](API\Runtime\Core\UObject\FName) SessionName, const [FOnUnregisterLocalPlayerCompleteDelegate](API\Plugins\OnlineSubsystem\Interfaces\FOnUnregisterLocalPlayerComplete-) & Delegate )